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The Orange Box: Portal Hints
Chapter 2
1 of 7: See the Testchamber 04 hints for more detailed info on this chapter.
2 of 7: In Chamber 04, there's a camera on the wall near the glass partition, plus another on the wall to the right of the exit door. [8]
3 of 7: The first camera in Chamber 05 is kind of hard to see on the wall above the doorway to the main testing room.
4 of 7: If you fire a blue portal at it before entering the main room, the camera won't be destroyed until after you enter the main room (because that's when the orange portal is opened). [9]
5 of 7: Another camera is on the wall near Chamber 05's exit door. [10]
6 of 7: After you go through that exit door and get yourself onto the transparent flooring, check the nearby walls for another camera. [11]
7 of 7: Chambers 06 and 07 have no cameras, so that's it for this chapter.